Optical scanner



FIG. 1 is a front, right side perspective view of the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side view thereof, the left side view is a mirror image;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear view thereof. 

The ornamental design for optical scanner, as shown and described. 